This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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这可能被称作懒惰，但博士。克莱特曼有一个新的解释。他已证明，每个人都有每天的能量循环。

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